AUTHORS.txt

@@ -7,3 +7,4 @@ Authors
 - Kevin Wurster <wursterk@gmail.com>
 - Todd Small <todd_small@icloud.com>
 - Juan Luis Cano Rodríguez <juanlu@satellogic.com>
+- Kirill Kouzoubov

CHANGES.txt

 CHANGES
 =======
 
+2.2.2 (2018-12-20)
+------------------
+- Affine.itransform computed the wrong results for arrays with rotation or
+  shear (#40). This is fixed (#41).
+
 2.2.1 (2018-06-04)
 ------------------
 - Docstring improvements (#37).

README.rst

@@ -44,8 +44,8 @@ Matrices can be created by passing the values ``a, b, c, d, e, f`` to the
   Affine(1.0, 0.9999999999999999, 0.0,
          0.9999999999999999, 1.0, 0.0)
   >>> Affine.rotation(45.0)     # decimal degrees
-  Affine(0.7071067811865476, 0.7071067811865475, 0.0,
-         -0.7071067811865475, 0.7071067811865476, 0.0)
+  Affine(0.7071067811865476, -0.7071067811865475, 0.0,
+         0.7071067811865475, 0.7071067811865476, 0.0)
 
 These matrices can be applied to ``(x, y)`` tuples to obtain transformed
 coordinates ``(x', y')``.
@@ -62,8 +62,8 @@ They may also be multiplied together to combine transformations.
 .. code-block:: pycon
 
   >>> Affine.translation(1.0, 5.0) * Affine.rotation(45.0)
-  Affine(0.7071067811865476, 0.7071067811865475, 1.0,
-         -0.7071067811865475, 0.7071067811865476, 5.0)
+  Affine(0.7071067811865476, -0.7071067811865475, 1.0,
+         0.7071067811865475, 0.7071067811865476, 5.0)
 
 Usage with GIS data packages
 ----------------------------

affine/__init__.py

@@ -47,7 +47,7 @@ import math
 
 __all__ = ['Affine']
 __author__ = "Sean Gillies"
-__version__ = "2.2.1"
+__version__ = "2.2.2"
 
 EPSILON = 1e-5
 
@@ -516,7 +516,7 @@ class Affine(
         if self is not identity and self != identity:
             sa, sb, sc, sd, se, sf, _, _, _ = self
             for i, (x, y) in enumerate(seq):
-                seq[i] = (x * sa + y * sd + sc, x * sb + y * se + sf)
+                seq[i] = (x * sa + y * sb + sc, x * sd + y * se + sf)
 
     def __invert__(self):
         """Return the inverse transform.

affine/tests/test_transform.py

@@ -388,6 +388,13 @@ class PyAffineTestCase(unittest.TestCase):
         assert r is None, r
         assert pts == [(-8, -2), (2, 0), (-6, -4)]
 
+        A = Affine.rotation(33)
+        pts = [(4, 1), (-1, 0), (3, 2)]
+        pts_expect = [A*pt for pt in pts]
+        r = A.itransform(pts)
+        assert r is None
+        assert pts == pts_expect
+
     def test_mul_wrong_type(self):
         with pytest.raises(TypeError):
             Affine(1, 2, 3, 4, 5, 6) * None

debian/changelog

-python-affine (2.2.1-2) UNRELEASED; urgency=medium
+python-affine (2.2.2-1) unstable; urgency=medium
 
+  * New upstream release.
   * Bump Standards-Version to 4.2.1, no changes.
   * Drop autopkgtests to test installability & module import.
   * Add lintian override for testsuite-autopkgtest-missing.
   * Update watch file to limit matches to archive path.
 
- -- Bas Couwenberg <sebastic@debian.org>  Thu, 05 Jul 2018 11:04:26 +0200
+ -- Bas Couwenberg <sebastic@debian.org>  Fri, 21 Dec 2018 07:09:24 +0100
 
 python-affine (2.2.1-1) unstable; urgency=medium